The Thermophysical Properties of Iron Plasma

Apfelbaum, E. M.

doi:10.1002/ctpp.201500077

Cited by 16 publications

(29 citation statements)

References 45 publications

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“…The equation of state was not considered in Redmer et al . Experimental data for isochors, with densities lower than critical, were explained reasonably well within gas–plasma virial chemical models (e.g., see for Al and Fe). Interatomic interactions were taken into account in virial approximation for chemically reactive mixtures .…”

Section: Introductionsupporting

confidence: 58%

“…Dependence of electrical conductivity on density of iron at temperature T = 10,000 K. Filled squares correspond to experiment . Theory: dashed curve—Apfelbaum; small diamonds represent the COMPTRA data . This work: dotted and solid curves—electrical conductivity for free electrons only and total electrical conductivity in the “3+” model with use of calculation of jellium via “Hartree–Fock” (7)…”

Section: Calculation Of the Equation Of State And Electrical Conductimentioning

confidence: 99%

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Equation of state and transport properties of metals in warm dense matter regime

Хомкин

Шумихин

2017

Contributions to Plasma Physics

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The equation of state, composition, and electrical conductivity are calculated for the supercritical ionized fluid of aluminium. For calculation, we used the previously proposed chemical plasma model called “3+”‐component. The model includes atoms, immersed in jellium, and thermal electrons and ions. Part of the bound states electron density is referred to as jellium. The density of electron jellium increases with the compression of atomic gas and does not depend on temperature directly. The emergence of jellium can be termed the process of ionization in the full sense of the word. The conductivity of dense vapours is determined by the sum of the conductivity of the thermal electrons, calculated according to the Frost formula, and the conductivity of jellium, calculated according to the Regel–Ioffe formula. At compression, the electrical conductivity passes through the minimum from the conductivity of thermal electrons to the conductivity of electrons of jellium accordingly. Calculations of the equation of state and the electrical conductivity of supercritical metal vapours agree well with physical and numerical experimental data.

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Section: Introductionsupporting

confidence: 58%

Section: Calculation Of the Equation Of State And Electrical Conductimentioning

confidence: 99%

Equation of state and transport properties of metals in warm dense matter regime

Хомкин

Шумихин

2017

Contributions to Plasma Physics

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“…To describe this term, there are many expressions. In present calculations we have used the expression obtained in Potekhin et al, as in our previous studies . It is reliable and applicable for all necessary densities.…”

Section: The Modelmentioning

confidence: 99%

“…Besides, the knowledge of n s allows us to calculate the electrical conductivity σ . To do this, we have used the relaxation time approximation, as in our previous studies . The conductivity within this approximation is expressed as

σ = prefix- \frac{2 true| e true|^{2} \sqrt{2 m_{e}}}{3 π^{2} ℏ^{3}} true {truefalse\int}_{0}^{\infty} ϵ^{1.5} τ ((), ϵ) \frac{\partial f_{0}}{\partial ϵ} d ϵ, f_{0} = {(\exp (\frac{ϵ - μ}{k_{B} T}) + 1)}^{prefix- 1}, τ^{prefix- 1} ((), ϵ) = true \underset{s}{truefalse\sum} n_{s} A_{e s}^{m} ((), ϵ) \sqrt{\frac{2 ϵ}{m_{e}}} .

…”

Section: The Modelmentioning

confidence: 99%

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The pressure, internal energy, and conductivity of tantalum plasma

Apfelbaum

2017

Contrib. Plasma Phys

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The pressure, internal energy, and conductivity of a tantalum plasma were calculated at the temperatures 10–100 kK and densities less than 3 g/cm3. The plasma composition, pressure, and internal energy were obtained by means of the corresponding system of the coupled mass action law equations. We have considered atom ionization up to +3. The conductivity was calculated within the relaxation time approximation. Comparisons of our results with available measurements and calculation data show good agreement in the area of correct applicability of the present model.

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Thermodynamic, transport, and optical properties of dense silver plasma calculated using the GreeKuP code

Knyazev

Levashov

2018

Contributions to Plasma Physics

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The transport and optical properties of a dense silver plasma are calculated using our parallel GreeKuP code. The code uses the results of Vienna ab initio simulation package (VASP) as input information and is based upon the Kubo-Greenwood formula. The calculation is performed at the normal density 10.5 g/cm 3 and 3 kK ≤ T ≤ 20 kK. Under these conditions, the results are strongly influenced by the presence of the d-electrons in silver: the real part of dynamic electrical conductivity has a non-Drude shape, the temperature dependence of thermal conductivity is non-monotonic, and the Wiedemann-Franz law is violated. KEYWORDSGreeKuP code, Kubo-Greenwood formula, quantum molecular dynamics, transport and optical properties 1 2 COMPUTATIONAL TECHNIQUEOnly some of the issues concerning the computation technique will be discussed here. For more detailed descriptions, one may refer to our earlier paper [23] and earlier works. [16,17] Contrib. Plasma Phys.

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The Thermophysical Properties of Iron Plasma

Cited by 16 publications

References 45 publications

Equation of state and transport properties of metals in warm dense matter regime

Equation of state and transport properties of metals in warm dense matter regime

The pressure, internal energy, and conductivity of tantalum plasma

Thermodynamic, transport, and optical properties of dense silver plasma calculated using the GreeKuP code

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